answer = input('请问，xxxxx')
if answer == 'y' :
    proof = eval(input("请问酒精含量是多少？？"))
    if proof < 20 :
        print("未超标")
    elif proof < 80:
        print("已经构成酒驾")
    else:
        print("醉驾")
else:
    print('nothing')